GS Plant Foods has launched its liquid humic acid soil amendment as part of its collection of organic fertilizers and enhancers.

There are several studies in the literature dealing with the effect of metal-humic complexes on plant metal uptake, but none of them correlate the physicochemical properties of the complexes with ...

A reader e-mailed me with a question about humic acid. Since the quality of their lawn is not as good as they desire it to be, a lawn service has recommended an application of humic acid. They want to ...